Protecting People, Products and Critical Infrastructure

A Long History of Innovation
ATI, founded in 1961, revolutionized the world of specialized test equipment with the introduction of its first portable photometer. Since then, ATI has grown to become the global leader in designing and manufacturing precision instruments used to test and certify HEPA filters, filter media and cartridges, respirators, and protective masks. Our photometers, known for their quality and reliability, are trusted worldwide in critical environments that protect human health and essential infrastructure.

Expanding Product Solutions
Over the decades, ATI has continually expanded its product offerings and capabilities to meet the rigorous demands of its customers. Our Filter Leak Testing products are essential for verifying the performance of HEPA filters in cleanrooms, while our Automated Filter Testing products ensure that filter media used in respirators and cartridges meet stringent performance standards. We also provide Protective Mask Leakage Testing to confirm the fit and integrity of protective masks for military and first responders.

Commitment to Quality
Our commitment to quality is unwavering. ATI is the only photometer manufacturer with both ISO 9001 certification and ISO 17025 calibration accreditation, underscoring our dedication to precision and excellence. This focus on quality and innovation has earned us the trust of a diverse customer base that includes pharmaceutical manufacturers, medical institutions, certifiers, nuclear facilities, and defense organizations worldwide.

Strategic Growth and Global Reach
ATI’s growth has been driven not just by technological excellence but also by strategic partnerships and expansions. In 2016, we acquired DOP Solutions, a UK-based company with over 25 years of experience, enhancing our ability to provide local support and technical expertise in the EMEA region. Headquartered in the USA, with manufacturing facilities in the USA and the UK, and a regional office in China, ATI is well-positioned to serve customers wherever they operate, supported by a global network of over 50 distributors and service centers.

More Than an Instrument Manufacturer
Beyond manufacturing, we see ourselves as thought leaders and trusted advisors, dedicated to helping our partners solve their toughest challenges. We’re proud of the impact our work has on global health and safety, and we’re equally committed to giving back to the communities we call home. Our employees regularly participate in volunteer programs like local food banks and toy drives for children in need. Recognized by the Baltimore Sun newspaper as a Top Workplace many years running, ATI is a purpose-driven company that values both innovation and compassion.

Looking Ahead
As we look to the future, we remain focused on growth, evolution, and pushing boundaries—not just for today, but to make a difference for tomorrow. We invite you to join us on this journey, and together, we will continue to build something that truly matters.

Milestones

1996		Developed the TDA-2G, the world’s first digital aerosol photometer
		Developed the 4B Laskin-Nozzle Aerosol Generator designed to test filter systems, small or large
1997		Introduced the TDA-100P Penetrometer/Filter Tester, replacing the MIL-STD 282 test requirement with a cold nebulized aerosol, which remains the industry standard
1999		Introduced the TDA-100S Penetrometer/Filter Tester, a salt-based aerosol version of the TDA-100P
		Awarded ISO 9001 Certification at its Owings Mills, MD USA facility
2004		Introduced the 2H Aerosol Photometer to replace the TDA-2G
2005		Developed the Joint Services Mask Leakage Tester (JSMLT) for integrity testing of U.S. military protective masks
2012		Launched the 2i Aerosol Photometer, the only photometer providing full functionality and operational control from the scanning probe
		Introduced the 6D Laskin-Nozzle Aerosol Generator with integrated compressor
2016		Acquired DOP Solutions, a UK-based company with over 25 years of experience in manufacturing aerosol detection and generation instruments
		Developed the Polaron™ real-time Biodetection sensor
2017		Introduced the 5D Thermal Aerosol Generator as a replacement for the 5C Generator
2018		Launched the 100X Automated Filter Tester as a replacement for the 100-P, to test and validate filter media, replaceable particulate filters, and masks
2019		Awarded ISO 9001 Certification at its Letchworth, UK facility
2024		Introduced the 2i iProbe Plus Scanning Probe for the 2i Aerosol Photometer, providing secure data storage, reporting, and traceability in the palm of your hand
2025		Awarded ISO/IEC 17025:2017 Accreditation at its Owings Mills, MD USA and Letchworth, UK facilities

 

Air Techniques International is ISO 9001 certified and ISO/IEC 17025 accredited.